SLUSE14A December 2020 – February 2021 BQ76942
The BQ76942 device includes factory trim for the cell voltage ADC measurements in order to optimize the voltage measurement performance even if no further calibration is performed by the customer. Calibration can be performed by the customer on the production line to further optimize the performance in the system. The trim information is used to correct the raw ADC readings before they are reported as 16-bit voltage values. The 32-bit ADC voltage data, which is generated in units of ADC counts, is modified before reporting by subtracting a stored offset trim value. The resulting reported data does not include any further correction (such as for gain), therefore the customer will need to process them before use.
The device includes a factory gain trim for the voltage measurements performed using the general purpose ADC input capability on the multifunction pins as well as the TS1, TS2, and TS3 pins. It also includes factory gain trim on the voltage measurements of the PACK pin, the LD pin, and the top-of-stack (VC10) pin.